Installation "Failed to run pacman" error

General system EndeavourOS installation
1

Hey there!, I am trying to install EndeavourOS alongside Win11 (Dual Boot) and during the installation I encounter “Failed to run Pacstrap, Failed to run Pacman” error message and the online installer quits at 9%.

I have tried updating the arch mirrors using reflector tool, also I’ve tried updating the whole system with

sudo pacman -Syu & run

sudo pacman -Sy arch-keyring

Log can be found at https://termbin.com/ohb3
More logs are here https://0x0.st/82KS.txt

Also, I am using Mercury Neo Iso file with ventoy if that helps.

2

It looks like you didn’t select the check boxes to format the partitions in manual partitioning.

It is failing to write to the disk.

3

But I thought I formatted them already.

Please check these https://0x0.st/82Kj.txt if that helps.

4

I can’t say for sure what happened but this is the error:

2025-03-31 - 18:10:55 [6]: [PYTHON JOB]: "pacstrap: error: could not open file /tmp/calamares-root-etvskumr/var/lib/pacman/sync/download-eATf7q/endeavouros.db.part: Permission denied"

This is the first time it tries to write to the install after mounting the partitions and it can’t write the files.

5

Ok I’ll select the formatting checkbox & let you know. I did the formatting outside the installer because I wanted to preserve the LVM names of the drives.

6

The other thing to be aware of is that Calamares support for LVM is not fully working.

There are numerous open issues upstream related to LVM.

7

I tried formatting from the installer & it shows formatting error

Log: https://termbin.com/o5de

8

Calamares is closing the volumes:

     "Successfully closed mapper device /dev/mapper/ROOT_VG-swap_lv." 
     "Successfully disabled volume group ROOT_VG."

This is by design in Calamares, you can’t externally open volumes and use them in Calamares.

I believe people have found workarounds to this if you do some searching.

9

Is this what you’re talking about sir??

10

This is one of the workarounds:

11

Thanks a lot! I’ll try it and let you know, somewhat busy rn.

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12

I read the post, & I did the set up quite similarly too, I did not use calamares to make lvm partiions, I used terminal commands such as pvcreate, vgcreate & lvcreate to make them. The author uses partition manager, though I don’t think that should make any difference. The point here was to make partitions manually if I understood correctly.

And as my system is uefi, I did not make 8MB bios_grub partition, as I am dual booting with linux I mounted 100MB windows efi partition on /boot/efi.

Will mounting these partitions mentioned https://github.com/calamares/calamares/issues/2343#issuecomment-2175960092 here help, that I’ll have to check.

13

Broo!! @dalto I got it installed man!!.

I followed this comment

while true; sleep 0.1; do sudo vgchange -ay; done

I executed it right before hitting install & it went just smoothly as intended. I guess it did not allow the calamares to disable the volume group. Other things I just did normally as I was doing before.

I am so happy Man! I am really thankful to you for your prompt replies and assistance.

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